Belt-shifter.



J. R. PEARSON.

BELT SHIPTER.

APPLICATION FILED 312.25, 1914.

Patented July 21, 1914.

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PEARSON, 0F CINCINNATI, OI-IIO, ASSIGNOB TO-THE,ACME MACHINE TOOL COMPANY, OF CINCINNATI, OHIO, A. CORPORATION OF OHIO.

BELT-SHIFTER.

Specification of Letters Patent.

Patented July 21,1914.

Application filed. February 26,1914. Serial No. 821,159. I

To all whom it may concern:

Be it known that I, J AMES R. PEARSON, a citizen of the United States, residing at Cincinnati, Ohio, have invented'a new and useful Improvement in Belt-Shifters, of which the following is a specification.

My invention relates to belt shifters of the class adapted to the use of stepped pulleys or for other suitable purposes, and the objects of my improvements are to provide means for shifting the opposite stretches of the belt alternately; to provide pawl and ratchet mechanism for turning two shafts alternately in opposite directions; to provide means for reversing the alternate direction of the shafts; to provide a hand lever with double and reversible pawl and ratchet mechanism, and to provide simple and durable construction and assemblage of the various members for securing facility of operation and elficiency of action. These objects-may be attained in the following described manner as illustrated in the accompanying drawings, in which Figure 1 is a front elevation of a belt shifter embodying my improvements; Fig. 2 a side elevation; Fig. 3 a front elevation of the pawl and ratchet connections for actuating shafts disposed in alinement; Fig. 4 a section on the line b b of Fig. 6; Figs. 5 and 6 cross sections on the line a a of Fig. 4: looking toward the right and left respectively, and Fig. 7 a plan of shifter racks provided with loops 6 and 7 for the respective stretches of the belt. Bracket housings 8 and 9 are formed with guides 11 for the longitudinal movement of the racks therethrough.

Shafts 12 and 13 in alinement are journaled at opposite ends in the housings S and 9 and each provided with a pinion 14: in engagement with the corresponding rack. Said shafts are journaled at their adjacent ends in a housing 15 and provided with corresponding ratchet wheels 16 and 17. A housing 18 swiveled on the shafts within the slot 19 formed in housing 15 is provided with a doubleset 21 and 22 of oppositely disposed pawls which are pivotally secured in the recesses 23- and 24 formed therein. Springs 25 serve to move and maintain the pawls under a yielding pressure in engageslot 33 formed in the hand lever for limiting its rotative movement.

In operation, the hand lever may be turned in one direction to the extent of the slot therein for actuating the bosses 29 to move and maintain the pawls 21 out of engagement with the ratchet wheels and'also for disengaging the bosses 31 from the pawls 22 that the springs 25 may move them into engagement with the corresponding ratchet wheels. The opposite turn of the hand lever actuates the corresponding bosses in like manner to disengage the pawls 22 and permit the automatic engagement of the pawls 21 with the corresponding ratchet wheels. The lateral movement of the hand lever alternately in opposite directions during the engagement of pawls 21 serves to turn the shafts with the pinions alternately in opposite directions for moving the racks with the corresponding stretches of the belt alternately on adjacent steps of the pulleys and toward one end thereof. In like manner, during the engagement of pawls 22 the same lateral movements ofthe lever serve to actuate the same connections to shift the corresponding stretches of the belt alternately on adjacent steps of the pulleys and toward the opposite end thereof.

Having fully described my improvements, what I claim as my invention and desire to secure by Letters Patent of the United States is 1. A belt shifter comprising two shafts provided with ratchet wheels, a housing swiveled thereon and provided with pawls arranged to engage with the said wheels, and a hand lever provided with selective means fordisengaging certain of said pawls from the wheels.

1 2 A belt shifter comprising two shafts journaled in a housing and provided with adjacent ratchet wheels, a hand lever swiveled concentric with the wheels and provided with a plurality of pawls adapted to engage with the wheels, and selective means actuated by said lever for engaging or releasing the pawls in pairs and for turn- A radial pin 32 secured in the stud '27 movably engages with the ing the shafts alternately in either of opposite directions.

3. A helt shifter comprising a housing, tvvo shafts in alinement With their adjacent K ends journaled therein and each provided with a ratchet Wheel, a member sWiveled concentric With said Wheels and provided with tWo pairs of pavvls adapted to engage With opposite sides of the corresponding Wheels, and a hand lever sWiveled on the disposed shafts, a ratchet Wheel and a pin ion secured on each shaft, shifter racks engaging With the pinions, pavvls arranged to engage With the Wheels, a hand lever and selective means controlled thereby for alternately disengaging certain pavvls, Whereby the shafts may be turned alternately in either of opposite directions and in predetermined order.

JAMES R. PEARSON.

Witnesses:

A. J. J ONES, WILLIAM H. BocK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

